flrudions as 1 drew up for him, and he returned foon 
after with a fair and beautiful Draught very expreflive 
of each Particular we defired; an cxadtCopy of which 
my Brother lately fent over to the Royal Societyy by one 
of their Worthy Members, and my highly efteemed 
Friend, the Honourable Francis Roherts^ when he went 
laft from hence, this I believe you'll find hanging up in 
their Repofitory at Grejham^Colkdge, to which I muft de- 
fire you to have recourfe, for the whole Map was too 
large and bulky to be inclos'd in this Letter * : However, 
I have fcver'd from it one of its mofl inftrudlive Schemes^ 
as being the chief and mofl: efiencial part of it all, and 
have here fent it you ; from whence with the Help of, 
the Defcription already publiflied, you will eafjy fraine 
to your felf a juft Idea of the moft fingular and remarka- 
ble Properties of this Stone of the Giants Caufmy^ 
See the Talk. 
Here you have expreft by the fame Scale, all the va- 
rious Figures of the feveral forts of 'joints and Colums 
that have been found, by late careful Obfervation to 
make up the Caufway. 
Figure i , fliews a Joint but of Three Sides. 
Figure x. a Joint of Four Sides* 
Figure 3. a Joint of Five Sides. 
Figure 4. a Joint of Six Sides. 
Figure ia Joint of Seven Sides. 
J A F^gttr^ of thisis Printed, Numb. 235. of thefe Tranl4(!lioiis. 
Figure 
